Germany’s oldest party was founded in 1875, and is described as "center-left". It roots in the 19th century labor movement.
The SPD is the second largest party in terms of voter support, but the largest in terms of membership. Its voter base is the working class in urban areas. SPD icon Willy Brandt was foreign minister in the first "grand coalition" government with the CDU 1966-1969 and then became the first SPD chancellor.
Germany's left-wing party has vowed to pursue a higher minimum wage, raise corporate taxes and protect refugees. The Left also tried to distance itself from the SPD while holding out for the possibility of a coalition.
With the current legislative period approaching its climax, time is running out for the Social Democratic Party (SPD) to push through a same-sex marriage bill. Their conservative coalition partners remain on the fence.